among_avi1 = array1d(1..10, [4, 5, 5, 6, 6, 6, 7, 7, 7, 7]);
among_avi2 = array1d(1..10, [4, 5, 5, 6, 6, 6, 7, 7, 8, 8]);
among_vi = 7;
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